We track COVID-19 variants in California to control the spread of the disease.

On this page:

Variants in California

California genetically sequences a sample of positive COVID-19 tests to determine their variant. Knowing what variants are circulating in California informs public health and clinical action.

This chart shows the sample of sequenced positive tests where the variant was identified. Sequencing can only be done at specialized labs. It generally occurs several days or more after a test is identified as positive for COVID-19. Not all positive COVID-19 tests are genetically sequenced.

  • % of sequenced
  • Variant data is updated weekly. The chart has data on specimens collected through {CHART_LAST_DATE} and was updated on {CHART_PUBLISH_DATE}. The California Department of Public Health has more information and data about variants.
  • Week ending
  • Pending
  • Data incomplete for recent dates
  • All time
  • 6 months
  • 90 days

Explore more data

State data

Statewide and county cases, deaths, hospitalizations, and tests, including by vaccination status, gender, and age

Vaccination data

State and county data about vaccination, including by race and ethnicity and age

Health equity data

How COVID-19 has affected different communities across the state

Data and tools

In-depth models, dashboards, databases, and information about California’s COVID-19 data reporting